Add Sync Identical Files tasks to build group

Author: Dave Bartolomeo

.vscode/tasks.json

@@ -1,4 +1,7 @@
 {
+    // To run a task, select the `Terminal | Run Task...` menu option, and then select the task from
+    // the list in the dropdown, or invoke the `Tasks: Run Task` command from the command palette/
+    // To bind a keyboard shortcut to invoke a task, see https://code.visualstudio.com/docs/editor/tasks#_binding-keyboard-shortcuts-to-tasks.
     // See https://go.microsoft.com/fwlink/?LinkId=733558
     // for the documentation about the tasks.json format
     "version": "2.0.0",
@@ -12,6 +15,7 @@
                 "config/sync-files.py",
                 "--latest"
             ],
+            "group": "build",
             "windows": {
                 // On Windows, use whatever Python interpreter is configured for this workspace. The default is
                 // just `python`, so if Python is already on the path, this will find it.